Tired of going through the hassle every year of getting the Christmas lights out of the attic, untangling them, sorting them, checking for blown blubs, getting the ladder and hanging them all up, just to take them all back down a few weeks later?

I propose a spray application consisting of bioluminescent
beads of various colors suspended in a clear quick-dry adhesive solution. The container would look much like an exterminators jug and wand. Just go out and spray down the bushes and trees. Set the nozzle to "fine line" and run a swipe along the eves and doorways of your house. Voila! A colorfully decorated house and yard in minutes. The beads and adhesive would naturally biodegrade after a couple of weeks, and would be water soluable. Tired of the festivities? Just break out your garden hose and wash the cheer away. If it rains, it's not too much trouble to go out afterwards and spray on a second coat.

Heck, as both lights and adhesive would be completely non-toxic, you could feel free to spray yourself down before heading out to the rave!

[Worldgineer], you don't need living organisms for bioluminescence, the label applies to the glowing chemical compounds that occur biologically, even when isolated or created in a lab. See the BioLume link I added.
The advantage of bioluminescent compounds is that they can be rapidly biodegradable and won't poison your plants/pets/self, unlike paint beads.